UK Immigration - 591,000 (net 252,000)
Australia Immigration - 168,623 (net 77,000*)
For such a small nation, the UK does attract a high number of new arrivals, yet the property market is flat - no-one is buying.
In contrast, Australia can't build them fast enough - immigration "guarantees a housing shortage", and therefore perpetual property prices. Even now, they say the shortage will kick in and prices will jump again.
BBC News : Net migration to UK in 2010 at record high
Australian Government : Key Facts In Immigration